I have one slow leaking Run flat mounted on my Kosei wheels. The leak is right where the inside bead connects to the rim. I watched as a little bubble appeared about every 2 seconds. This is clearly not a spot that could be repaired on the tire and there are no apparent bangs or dents in the rim a that point or anywhere else.
In was thinking, is it possible for a defect in the tire to cause such a thing, or is there maybe a little nipple of rubber that somehow is sticking out there and not allowing that spot on the rim to completely seal?

I won't need much of an excuse to dump these runflats and get some Goodyears on sale at Tire Rack, but I'm sure there's another 5000 miles left on these tires.

Any help would be appreciated.

Paul

 

it's possible that the installer damaged the bead while installing them.

i would take it back to where you got it installed and have them reinstall it.
sometimes you get lucky and it fixes the problem.

 

I had problems with one of my Dunlop runflats holding air as they got down to the last 5k or so miles, and these were the stock tires on the stock webspokes. For whatever reason, it would lose about a pound a week from the right rear. No probs since i switched to BFG g-Force KDWs

 

I am on my second set of Pirelli run flats (I drive 160 miles a day to/from work) and I have lost air randomly with both sets. I check the pressure weekly and every week at least one tire is low, sometimes down to 15 lbs. The low pressure warning light is a common occurence that I've finally just got accustomed to seeing.

I have found that if I air the tire to 45 lbs and then bleed the air down to the normal range of 30-35 lbs., it appears to correct the problem for a few weeks.

The next set of tires I buy will not be run flats and I'll carry a can of "fix-a-flat" with me.

 

thanks, good to know I'm not alone here.

Paul

 

I'm a new owner, so it's good to hear this. I read a thread last week and decided to up the PSI to 34. When the warning light came on after 1 week, I feared a nail. But front & back left had both lost 4-6 PSI (rights had gone up to 36!). I reset all to 30 and am waiting. 17" S-lites & runflats on 2002 MC - the jury is still out but I noticed the ride was not as good at 30psi, from the 34. I'll keep experimenting, but am weighing up a 2003 MCS maybe with x-lites and get away from the runflats?, i think i need to take a few test drives.